Wind Turbine Failure Analysis and Condition Monitoring

Wind turbines are complex electromechanical systems that operate under highly variable environmental loads and remote conditions. Failures can occur across blades, gearboxes, bearings, generators and supporting structures. Failure analysis seeks to identify root causes—such as material fatigue, lubrication breakdown, misalignment and extreme loading events—by combining laboratory testing, field measurements and numerical modelling. Condition monitoring employs continuous or periodic data acquisition and analysis methods (including vibration, acoustic emissions, oil chemistry and supervisory control and data acquisition signals) to detect incipient faults before they manifest as catastrophic breakdowns. Effective integration of failure analysis and condition monitoring underpins preventive maintenance strategies, reduces unplanned downtime and lowers levelised cost of energy, particularly in offshore and large‐scale onshore wind farms. Recent advances in sensor technology, data analytics and digital twins have enabled more accurate fault prognosis and adaptive control, supporting global ambitions for renewable energy reliability and sustainability.

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Wind Turbine Failure Analysis and Condition Monitoring publication trend

The graph below shows the total number of articles in wind turbine failure analysis and condition monitoring across all publications each year (not limited to Nature Index journals).

Technical terms

Condition monitoring: The continuous or periodic measurement and analysis of operational data to assess the health of components and predict failures.

Supervisory Control and Data Acquisition (SCADA): A system that collects real-time data on turbine performance (such as wind speed, rotor speed and temperatures) for monitoring and control purposes.

Vibration analysis: The examination of mechanical oscillations in turbine components to detect anomalies indicative of wear, imbalance or misalignment.

Drivetrain: The mechanical assembly—including gearboxes, shafts and bearings—that transmits rotor torque to the generator.

Tribology: The study of friction, lubrication and wear processes affecting interacting surfaces in relative motion.

References

1. Wind turbine nacelle testing: State-of-the-art and development trends. Renewable and Sustainable Energy Reviews (2023).
2. A review of wind turbine main bearings: design, operation, modelling, damage mechanisms and fault detection. Wind Energy Science (2020).
3. A Two-Stage Diagnosis Framework for Wind Turbine Gearbox Condition Monitoring. International Journal of Prognostics and Health Management (2020).